Science Trivia Resume

How to make Pythagorean numbers 

There are 9 coins and one of them is fake which is lighter than the others. Find a fake coin using balance (with no scale and weight) 2 times

Cut one paper into three pieces There is a rectangular paper on which square grids are drawn.  This paper is cut twice straight along the grid.  When it's a paper in the figure below, you can make 3 kinds of figure.  (1) When cutting the rectangular paper below twice, how many kinds of figure can you make?  (2) When it's cut once again, how many kinds of figure can you make?

   Kavli IPMU  = Kavli Institute for the Physics and Mathematics of the Universe

Bet is made on "Are there the two persons with same birthday in the class of 50 people or not?"  Should I bet on "Yes" ?  

I round off the 3rd digit number from the top of the number of 123rd power of 2. Find two digits number from the top of this number.